There are many, there are events in China pretty much every week. Kunlun Fight is the major one thanks to their kickboxing roster (arguably the top kickboxing org right now) and they acquired most of the RUFF roster when they went under. Art of War which was one of the OG Chinese promotions recently rebooted and has held a couple of events. WBK, CKF, Superstar Fight, WLF, Bullet Fly FC, and Dacheng Wuyi are other ones with varying levels of event strength. The majority of them mix kickboxing and MMA together on events.
ROAD FC out of Korea has been doing very well in China the past year, possibly the foreign promotion that has made the most headway there. ONE Championship continues to put on several events a year there to varying success/non-success. Rebel FC out of Singapore has held their last few events in China, idk how successful they have been but they put together solid events.